Tektronix 2467B

Theory of Operation—2465B/2467B Service
FRONT-PANEL
CONTROLS
^>
FRONT-PANEL
INDICATORS
<$>
ROW. COL,
AND ANALOG
SIGNALS
LED DATA
ANALOG
AND
DIGITAL
CONTROLS
CH 4 IN O-
CH 3 IN
CH 2 IN
CH 1 IN
LOW-VOLTAGE
POWER
SUPPLY
TO ALL
CIRCUITS
r
CD (CONTROL DATA)
AT AND AV
REFERENCE VOLTAGES
MPU
ROM
<$>
RAM
<3>
MPU BUS
m_7
CH 3
AND
CH 4
PREAMP
<i>
AUXILIARY
CONTROL
REGISTER
<$>
CH 3 GAIN
CH 4 GAIN
CH 4 SIG
CH 3 SIG
CH 4 TRIG
PICKOFF
CH 3 TRIG
PICKOFF
BWL
CH 2 OUT
CH 2
ATTENUATOR
AND
MAG LATCH
RELAYS
<J>
Ail
N/
CH 2
PREAMP
CD
CH 1
ATTENUATOR
AND
MAG LATCH
RELAYS
A12
<3>
CH 1
PREAMP
CD
LINE (60 Hz)
CNTL1
CNTL2
HORIZONTAL OUT (X)
3a-2
Figure 3-1. Instrument block diagram.